Gas-compressor



(No ModeLS J. B. STOBAEUS.

GAS COMPRESSOR. No. 323,751. Patented Aug. 4, 1885.

N. PETERS, Phu\ol.\hognpher. Washington. IIC.

UNITED Sii/rires.

JOHN B. STOBAEUS, OF

GAS-COM SPECIFICATION forming part of Letters Application led March 28,1885.

To a/ZZ whom it may concern:

Be it known that I, JOI-IN B. STOBAEUs, a citizen of the United States,and residing at Newark, in the county of Essex and State of New Jersey,have invented new and useful lmprovements in Gas-Compressors, of whichthe following is a specification. j

The object of my improvement is to reduce the clearance ingas-compressors to a minimum and to cool the plunger by the cold gasadmitted into the cylinder. I obtain these objects by providing thecylinder with a hollow plunger, through which the gas passes into thecylinder, and which exactly fits-the bore of the cylinder, the plungerbeing so adj usted that at the end of its upstroke it leaves noclearance between its upper end and the lower side of the cylinder-head,and being provided with an upwardly-opening valve at its top, while thecylinder-head is likewise provided with an upwardly-opening valve.

In the annexed drawing, A represents part of the frame of the machine;B, a pump-cylinder, secured upon the top of the frame; C, a hollowplunger, which exactly fits the bore of the cylinder,and which carriesat its top an upwardly-opening valve, c, through which gas is admittedinto the cylinder. D is a stufling-box, through which the plungerpasses; E and F, cylinderheads, of which the lower one, F, contains anupwardly-opening discharge-valve, b, while the upper one, E, is providedwith the discharge-pipe c. The top face of the valve a, when closed, ison a level with the top surface of the plunger, and the lower face ofthe valve b, when closed, is in line with the lower face ofthecylinder-head F.

G is the cross-head, which is guided in the frame A, and to whichreciprocating motion is imparted in the usual manner. 'Ihe plunger C isscrewed into the top of the cross-head G and so adjusted that at the endof the upstroke its top surface just touches the lower side of thecylinder-head F. The cross-head G is perforated in continuation of thebore of the hollow plunger, and a pipe, d, passes through the cross-headinto the hollow plunger. e is a stufling-box, through which the pipe dpasses. The pipe d is secured to some PATENT @Fricno NEWARK, NEW Jnnsnv.

PRESSOR.

Patent No. 323,751, dated August 4, 1885.

(No model.)

part of the frame A, and is connected to the gas supply.

During the downward stroke of the plunger the valve a is raised, and gasis admitted into the upper part of the cylinder from the pipe d andthrough the bore of the plunger. During the upward stroke the gas in thecylinder is rst compressed and then discharged through the valve b andpipe c.

I do not restrict myself to the means shown in the drawing forintroducing gas into the hollow plunger from the outside of thecylinder, since this may be accomplished by other well-known means-suchas an elastic pipe,or a jointed pipe connected to the cross-head or tothe lower end of the plunger. Y By having the valves a and l) located asshown and described, they can be madelarge, so that they are butslightly lifted by the passage of the gas. Undue heating of the plungeris prevented by the incoming cold gas, which passes through it.

I use, by preference, two cylinders placed upon the same frame, theplunger of one being on the upstroke, while that of the other is on thedownstroke.

Vith this compressor I am enabled to compress cold carbonio acid fromatmospheric pressure to eight hundred pounds per square inch, and more,without excessive heating, the compressed gas being liquefied by coolingit in a tank.

What I claim as my invention is 1. The combination, in a gas-compressor,of a vertically-arranged cylinder having at one end astufling-box and atthe opposite end a cylinder-head provided with an upwardlyopening valve,a dischargepipe extending from the cylinder-head, a hollow reciprocatingpiston closely fitting the bore of the cylinder and having at its innerend an upwardlyopening valve, and a gas-supply pipe extending-into andfitting the outer end ofthe piston, and on which pipe the pistonreciprocates, substantially as described.

2. The combination, in a gas-compressor, of a cylinder, B, a hollowplunger, C, closely fitting the bore of the cylinder and provided at itstop with an upwardly-opening valve, a,

:L cylinder-head, F, with au upwardly-opening valve, Z1, zn cross-head,G, to which Jshe my invention I have signed my name, in prosenoe of twowitnesses, this, 26th day of March, Io

hollow plunger is :uljustably connected, and 1885. a 021S-supply pipefixed to the frame of the v A Y 5 mohino and passing through thecross-head JOHN B' STOBEUS' into the hollow plunger, substantially asde- Vtllesses: scribed. A. FABER DU FAUR,

In testimony that I claim the foregoing as PAUL GERHARDT.

